Apache Module mod_auth_basic

Summary

This module allows the use of HTTP Basic Authentication to
restrict access by looking up users in the given providers.
HTTP Digest Authentication is provided by
mod_auth_digest. This module should
usually be combined with at least one authentication module
such as mod_authn_file and one authorization
module such as mod_authz_user.

Normally, each authorization module listed in AuthBasicProvider will attempt
to verify the user, and if the user is not found in any provider,
access will be denied. Setting the
AuthBasicAuthoritative directive explicitly
to Off allows for both authentication and
authorization to be passed on to other non-provider-based modules
if there is no userID or rule
matching the supplied userID. This should only be necessary when
combining mod_auth_basic with third-party modules
that are not configured with the AuthBasicProvider
directive. When using such modules, the order of processing
is determined in the modules' source code and is not configurable.

The AuthBasicProvider directive sets
which provider is used to authenticate the users for this location.
The default file provider is implemented
by the mod_authn_file module. Make sure
that the chosen provider module is present in the server.